585,752 active members*
3,831 visitors online*
Register for free
Login
IndustryArena Forum > CAM Software > BobCad-Cam > 2 axis profiling with contour ramping weird path
Results 1 to 2 of 2
  1. #1
    Join Date
    Jun 2013
    Posts
    15

    2 axis profiling with contour ramping weird path

    With BobCAD-CAM V28, I just discovered something weird at the end of 2 axis profiling with contour ramping (for a circular contour).
    If the "total depth" is not a multiple of "depth of cut", I get dangerous arc move at the end of the operation, just before the last arc move with constant Z.
    For example, 2.1mm depth, depth of cut 0.25mm, here is the GCODE, with the weird move in red color:

    Code:
    ************* 64 - Feed moves//Arc move XY**********
    G17 G3 X-15.371 Y11.168 Z-2.100 R19.000
    ************* 64 - Feed moves//Arc move XY**********
    G17 G3 X19.000 Y.000 R19.000 F552.
    ************* 64 - Feed moves//Arc move XY**********
    G17 G3 X-15.371 Y11.168 R19.000
    ************* 50 - Rapid moves//Rapid move Z **********
    G0 Z5.080
    ************* 71 = Operations//End of operation **********
    ************* 50 - Rapid moves//Rapid move Z **********
    G0 Z25.400
    ************* 5 - Ending blockes//End of program **********
    O100 endif
    M5
    M30
    NC Corrector display of the GCODE



    This move makes the tool colliding with the workpiece.
    Not visible on BC display or in the simulation, as below.



    So that looks like a postprocessor issue.
    Any idea ?

    Thanks.
    Frederic
    http://cnc.f1oat.org/

  2. #2
    Join Date
    Jun 2013
    Posts
    15

    Re: 2 axis profiling with contour ramping weird path

    Looks like I have solved the issue by changing line 222 in the postprocessor.
    I was using "e" option. That is better with "b"

    Code:
    222. Arc center a=absolute, b=incremental, d=unsigned inc., e=radius? b
    Now the generated code is
    Code:
    G17 G3 X-15.371 Y11.168 Z-2.100 I-19.000 J.000
    G17 G3 X19.000 Y.000 I15.371 J-11.168 F552.
    G17 G3 X-15.371 Y11.168 I-19.000 J.000
    http://cnc.f1oat.org/

Similar Threads

  1. 2D Contour Ramping: Postprocessor Issue
    By ToolChatter in forum BobCad-Cam
    Replies: 6
    Last Post: 04-24-2015, 04:03 PM
  2. Replies: 2
    Last Post: 11-06-2014, 02:37 AM
  3. Contour Ramping V24
    By Bear21211 in forum BobCad-Cam
    Replies: 3
    Last Post: 02-04-2013, 03:36 PM
  4. V24 profile contour ramping will not run finish
    By gizmo_454 in forum BobCad-Cam
    Replies: 17
    Last Post: 01-14-2012, 12:18 AM
  5. Profiling a contour - radius problem
    By BTC 111 in forum Mastercam
    Replies: 32
    Last Post: 01-31-2009, 05:04 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •